CN103102011A - Anaerobic bio-enhancement treatment method for cellulose ethanol wastewater - Google Patents
Anaerobic bio-enhancement treatment method for cellulose ethanol wastewater Download PDFInfo
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Abstract
The present invention relates to an anaerobic bio-enhancement treatment method for cellulose ethanol wastewater, wherein the method is used for treatment of high concentration salt-containing organic wastewater during an ethanol production process adopting corn straws and other plant fiber as raw materials. According to the method, a two stage anaerobic treatment process is performed on cellulose ethanol wastewater, wherein a salt-resistant dominant strain is regularly poured into a first stage anaerobic tank to carry out bio-enhancement so as to reduce sulfates in the wastewater into hydrogen sulfide gas, and a sludge reflux manner is adopted to adjust concentrations of inorganic salts and pollutants in the influent so as to meet requirements of the anaerobic biological treatment process, such that high concentration organic matters in the wastewater are converted into biogas so as to reduce inorganic salt content in the wastewater and easily achieve the follow-up biochemistry treatment purpose. In addition, the method has advantages of low investment and low operation cost.
Description
Technical field
The present invention relates to a kind of anaerobe enhanced processing method of cellulose ethanol waste water, be used for take the processing of the vegetable fibres such as maize straw as raw material production ethanol process middle and high concentration salt-containing organic wastewater.
Background technology
General requirement along with aggravation, recycling economy and the minimizing carbon emission of the worsening shortages of global fossil energy, environmental pollution, the exploitation of renewable energy source has become the theme in these epoch, and is one of important channel of renewable energy source exploitation take vegetable fibres such as maize straw, Chinese sorghum straws as the raw material production cellulose ethanol.
Cellulose ethanol is normally take vegetable fibres such as maize straw, Chinese sorghum straws as raw material, obtain high purity ethanol by steaming the techniques such as quick-fried pre-treatment, cellulase hydrolysis, saccharifying enzyme fermentation, ethanol rectifying and dehydration, and mix production process of alcohol products in gasoline component, as clean fuel for vehicle.In its production process, because most hemicellulose in raw material (C5 sugar), xylogen can not be utilized, add the by products such as acetic acid, glycerine, lactic acid, furfural of association in process, make the suspended substance and the dissolved organic matter that contain high concentration in the final mash by discharging at the bottom of the ethanol distillation tower.simultaneously, for improving cellulosic hydrolysis efficiency in stalk, alcohol concn in fermented liquid, alcohol product yield and the process of reduction energy consumption, the consideration of zymin consumption, steaming quick-fried pre-treatment carries out under acidic conditions often, steam quick-fried pre-treatment after namely with the sulfuric acid more than 1%, fibrous material being flooded in advance, to reach the purpose of Mierocrystalline cellulose weave construction in effective destruction stalk, and the sulfuric acid that this process adds and be used for follow-up hydrolysis, the sodium hydroxide (sheet alkali) that adds with adjusting in fermenting process is present in ethanol distillation tower fermentation liquid with the form of inorganic salt the most at last, cause cellulose ethanol waste water containing on the basis of high-enriched organics, the character that has again high saliferous.Through detecting all sidedly and dissecting, cellulose ethanol waste water is mainly derived from ethanol distillation tower fermentation liquid, and its principal character is: the insoluble solid object height, be about 5%, and be mainly the fine xylogen of particle diameter, solid-liquid is not easily separated; Temperature is high, is about 95 ℃; Colourity is large, is acid, and the pH value is 5 left and right; COD is 130,000 mg/L approximately, are mainly solvability wood sugar, glycerine, acetic acid, volatile phenol, lactic acid, xylogen (poly-ring aromatic compounds), furfural and various fermentation intermediate product; BOD
5/ COD=0.5～0.55, wherein the bio-refractory thing is mainly aromatics; Inorganic salt content is about more than 2%, take sodium sulfate as main, and sulfate radical approximately 1%.Inorganic salt in waste water, sulfate radical, acetic acid, furfural, SS and xylogen etc. are processed conventional biological process has serious restraining effect.
High-concentration sewage for the generation of cellulose ethanol production process, the main treatment process that adopts is that high-concentration sewage is carried out anaerobic treatment at present, under anaerobic, the high-enriched organics in waste water being changed into biogas (methane, carbon dioxide mix gas) fully utilizes.All propose to adopt up-flow anaerobic sludge blanket (UASB) art breading sewage as CN01808115.0 and US6555350, make inhibitory substance carboxylic acid in sewage, furfural, furans, phenol etc. remove more than 80%, sewage after processing more than at least 5% is recycled, and produces biogas utilization by anaerobically fermenting simultaneously.Yet, this inventive method is only applicable to process the cellulose ethanol waste water under the quick-fried pre-treating process of neutral (not acid adding) steaming, be the lower waste water of inorganic salt content, the processing of acidity being steamed the treating high-concentration saline organic wastewater under quick-fried pre-treating process makes it to be not suitable for to adopt because of following two major causes.At first, contain the inorganic salt more than 2% in ethanol distillation tower bottom fermentation mash after adopting acid steaming quick-fried, require (inorganic salt are controlled at below 1%) well beyond conventional anaerobically fermenting treatment process, under this situation, growth and the activity of anaerobically fermenting microbial bacteria obtain severe inhibition, even cause the failure of anaerobic treatment process; Secondly, sulfate radical content in waste water is about 10,000 mg/L, well beyond the required value (sulfate radical is controlled at below 5000mg/L) of anaerobically fermenting treatment process, under this situation, sulfate radical in waste water will be reduced to by anerobe the hydrogen sulfide of high density, thereby the methanation fermenting process of severe inhibition high-enriched organics causes the biogas production rate to descend rapidly, can not produce biogas even at all.The reference of method at present can to(for) the processing of this class treating high-concentration saline organic wastewater has two kinds, and first dilution process is namely diluted it with hyposaline waste water, processes after making Pollutant levels satisfy the biological process processing requirement.The characteristics of producing due to cellulose ethanol (the stalk consumption is large, carry that radius is little, found the factory in rural area or suburb) determine around it general without dilution water optionally, so the dilution process method is difficult to be suitable for.It two is multiple-effect evaporation desalinations, namely first waste water is carried out multiple-effect evaporation and processes, and the condensed water after processing is carried out anaerobic-aerobic again and processed.This method is at present multiplex produces fuel alcohol (or edible ethanol) field in corn fermentation, although energy consumption is higher, can be compensated by the high-quality feed (DDGS) that recovery has a higher-value.And the main ingredient in cellulose ethanol waste water is xylogen and various organic and inorganic salt, the albumen equal size does not reach the requirement of DDGS product index, be difficult to reach high price and reclaim (only can work as general fuel utilization), adopt this treatment process will significantly increase the production cost of cellulose ethanol.
Based on above analysis, although adopt acid cellulose ethanol production of steaming quick-fried pre-treating process in technology, have a larger advantage economically, but also correspondingly brought larger treating high-concentration saline organic wastewater to process problem, still there is no at present economically viable treatment process.
Summary of the invention
the present invention is directed to the acid water quality characteristics that steams the cellulose ethanol waste water of quick-fried pre-treatment route, a kind of anaerobe enhanced processing method of cellulose ethanol waste water is proposed, waste water is adopted the two phase anaerobic treatment process, regularly adding anti-salt dominant bacteria in the first paragraph anaerobic pond carries out biological reinforced, sulfate reduction in waste water is changed into hydrogen sulfide, and the mode of the sludge reflux by the second segment anaerobic technique is adjusted inorganic salt and the Pollutant levels of water inlet, to satisfy the requirement of Anaerobic treatment technique, make the high-enriched organics in waste water change into biogas, to reach the purpose that reduces the inorganic salt content in waste water and help follow-up biochemical treatment.
the detailed process of the anaerobe enhanced processing method of cellulose ethanol waste water of the present invention is: from mash at the bottom of the tower of cellulose ethanol distillation tower through solid-liquid separation and cool after, returned sluge liquid after processing with the second segment anaerobic pond is mixed into the first paragraph anaerobic pond, simultaneously regularly add appropriate anti-salt anaerobic species in the pond, the anaerobic sludge that waste water is produced at first paragraph anaerobic pond self, complete the elementary anaerobic digestion reaction of waste water under the returned sluge of second segment anaerobic pond and the anti-salt anaerobic species acting in conjunction that adds, partial organic substances is changed into biogas, the part of sulfuric acid root is reduced to hydrogen sulfide and enters in biogas, the water outlet of first paragraph anaerobic pond enters the second segment anaerobic pond and processes, the anaerobic digestion reaction further occurs in the waste water in the second segment anaerobic pond under the anaerobic sludge effect of self producing, most of organism is changed into biogas, and water outlet enters settling tank and processes, the at least part of first paragraph anaerobic pond that is back to of the sludge liquid of settling tank.Unnecessary sludge liquid can be back to the second segment anaerobic pond.
In the inventive method, the first paragraph anaerobic pond adopts conventional contact process anaerobic reation pool, to adapt to the processing that contains high concentration suspended matter; Regularly add anti-salt anaerobism dominant bacteria in anaerobic pond, make high-concentration salt-containing wastewater issue in the acting in conjunction of the active sludge of the anaerobic sludge of self producing and the anti-salt advantage anerobe that adds and recovery the oxygen digestion reaction of beginning to detest, partial organic substances and sulfate radical are changed into respectively biogas and hydrogen sulfide, reduce the inorganic salt content in waste water; The anaerobic pond water inlet is the mixture of the sludge liquid after the former water of cellulose ethanol and second segment anaerobic pond are processed, by conditioning of mud hydraulic control influent COD≤40000mg/L processed, inorganic salt≤1.5%(massfraction).
In the inventive method, the second segment anaerobic pond adopts the up-flow anaerobic sludge blanket reaction tank, processes with the high-load anaerobic that adapts to waste water (lower concentration suspended substance); Secondary anaerobic digestion reaction occurs in the waste water in reaction tank under the anaerobic sludge effect of self producing, most of organism and remaining sulfate radical are changed into respectively biogas and hydrogen sulfide, and the inorganic salt content in waste water is able to further reduction; After the anaerobic pond water inlet precipitated by settling tank, water outlet can be carried out subsequent disposal, and sludge liquid can be back to the first paragraph anaerobic pond.
First paragraph anaerobic pond of the present invention mainly is comprised of gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device etc.Sludge liquid two portions after charging waste water is processed with the second segment anaerobic pond by the former water of cellulose ethanol (solid-liquid separation and cooling rear) consist of, and its control volume ratio is: the former water/sludge liquid of cellulose ethanol=1:2～1:5 is preferably 1:3～1:4; Charging waste water is entered by anaerobic pond underfeed pipe; The biogas that produces is discharged by the pneumatic outlet at anaerobic pond top; After processing, water outlet is discharged by the anaerobic pond drainage conduit.The residence time of waste water in anaerobic pond is 3～10d, is preferably 5～8d; The water inlet volumetric loading of anaerobic pond is 4～8kgCOD/m
3.d; In anaerobic pond, the service temperature of waste water is 40～42 ℃.
The anti-salt anaerobism dominant bacteria that adds in first paragraph anaerobic pond of the present invention is a kind of commercially available biological product, is that syBIO1249[is available from Dalian source of students water treating equipment Development Co., Ltd as the trade mark] and function class like the commercial goods, dosage is 0.2～2g/m
3Waste water/day, dosing method is to add once in every 0.5～3 day.This product is a kind of by the spore of programmed screening and domestication and the mixture of the microorganism that nourishes and grows, and microorganism wherein can produce enzyme such as lipase, proteolytic enzyme, amylase and the cellulase etc. of multiple high vigor.Its main products characteristic is bacterial count 3,000,000,000/gram; Stability kept 1 year at 2 ℃～35 ℃; PH scope 5.0～9.8; The bacteria types subtilis spore mixes with the microorganism that nourishes and grows; The outward appearance chocolate brown powder.Anti-salt anaerobism dominant bacteria will carry out activation treatment before adding in the anaerobic pond, namely with the deionized water and stirring dissolving of 20 times more than 0.5 hour, puts in anaerobic pond after making robe all be scattered in water again.
Second segment anaerobic pond of the present invention is a kind of common upflow anaerobic sludge blanket reactor (UASB) structure, mainly is comprised of four parts such as distribution plate, granule sludge treatment zone, bulking sludge breeding blanket, gas-solid-liquid separators.Enter reactor from the processing water outlet of one section anaerobic pond by the bottom of UASB, methane gas is discharged by the pneumatic outlet of reactor head; Process water outlet and be expelled to settling tank by the reactor head liquid outlet.The residence time of waste water in UASB is 12～30h, is preferably 15～25h; The water inlet volumetric loading is 5～15kgCOD/m
3.d, be preferably 8～12kgCOD/m
3.d; In reactor, the service temperature of waste water is 38～40 ℃.
The biogas that produces in first paragraph of the present invention and second segment anaerobic pond directly or through sending into the biogas storage tank after gas sweetening is recycled (or utilizing after removing hydrogen sulfide) by the methane recovery pipe, and the volumetric concentration of the methane in sewage gas gas that obtains is 40%～60%.
Detention tank of the present invention is a kind of radical sedimentation basin or vertical sedimentation basin of routine, and the residence time of waste water in settling tank is 2～4h, and sludge liquid is back to the first paragraph anaerobic pond and processes as the dilution water of the former water of cellulose ethanol.
The inventive method adopts the two phase anaerobic treatment process to cellulose ethanol waste water, undertaken biological reinforced by the mode that adds anti-salt dominant bacteria and control sludge reflux, treating high-concentration saline organic wastewater is effectively addressed, high-enriched organics in waste water changes into the methane recovery utilization, vitriol is reduced into hydrogen sulfide, reaches the purpose that reduces the inorganic salt content in waste water and help follow-up biochemical treatment.Water outlet after the inventive method is processed greatly reduces the difficulty of waste water subsequent biological treatment, can reach emission standard after adopting aerobic treatment.
The method that the present invention proposes has adopted biological reinforced treatment process to process treating high-concentration saline organic wastewater, has advantages of that investment is little, working cost is low.
Description of drawings
Fig. 1 is a kind of cellulose ethanol anaerobic waste water of the present invention biological enhanced processing method schematic flow sheet;
Wherein: 1, first paragraph anaerobic pond; 2, second segment anaerobic pond; 3, detention tank; 4, reinforced anaerobic microorganism dosing system; 5, methane recovery tank.
Embodiment
Describe below in conjunction with the specific embodiment of accompanying drawing to the inventive method.
Cellulose ethanol production wastewater (from the mash at the bottom of the ethanol distillation tower) through the pressure filter press filtration with after cooling with mudpan
3Sludge liquid after processing is mixed into the first paragraph anaerobic pond
1, simultaneously by the enhancement microbiological dosing system
4To the first paragraph anaerobic pond
1In (regularly) add a certain amount of anti-salt anaerobism dominant bacteria, make waste water complete the elementary anaerobic digestion reaction of waste water under the effect of the second segment anaerobic pond mud of the anaerobic sludge of self producing, backflow and the anti-salt advantage anerobe that adds, with the partial organic substances in waste water change into biogas, sulfate radical is reduced to hydrogen sulfide, inorganic salt content is got to a certain extent remove, the water outlet after processing enters the second segment anaerobic pond
2Process.The anaerobic digestion reaction further occurs in the waste water in second segment anaerobic pond 2 under the anaerobic sludge effect of self cultivating, most of organism in waste water is changed into biogas, sulfate radical Restore All is hydrogen sulfide, inorganic salt content in waste water is further reduced, and the water outlet after processing enters detention tank
3Process.Mudpan
3In waste water after sludge settling separates, water-containing sludge is back to the first paragraph anaerobic pond with suitable ratio
1Before with enter the first paragraph anaerobic pond after cellulose ethanol production wastewater (former water) mixes
1In, control in this way the first paragraph anaerobic pond
1Inorganic salt and the Pollutant levels of water inlet are to satisfy the processing requirement of anaerobic biological treatment steady running; Clear liquid after settling tank precipitation enters the subsequent biological treatment system and processes.The first paragraph anaerobic pond
1With the second segment anaerobic pond
2The biogas of middle generation and hydrogen sulfide are respectively by top, pond vapor pipe directly or enter the methane recovery tank after the gas sweetening (not shown in figure 1)
5Recycle.
First paragraph anaerobic pond of the present invention
1Be a kind of common contact process anaerobic reation pool, selecting of this type anaerobic reation pool is mainly to consider still to contain higher suspended substance after the press filtration of cellulose ethanol waste water, as xylogen and fermentation residue etc.Anaerobic pond mainly is comprised of gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device etc., charging waste water is entered by anaerobic pond underfeed pipe, the biogas that produces is discharged by the pneumatic outlet at anaerobic pond top, and after processing, water outlet is discharged by the anaerobic pond drainage conduit.Charging waste water is the former water of cellulose ethanol and second segment anaerobic pond
2The returned sluge of discharging from mudpan 3 after processing consists of, and its control ratio is the former water/sludge liquid of cellulose ethanol=1:2～1:5, is preferably 1:3～1:4, to guarantee COD≤40000mg/L, inorganic salt≤1.5% in parallel feeding waste water.The residence time of waste water in anaerobic pond is 3～10d, is preferably 5～8d; The water inlet volumetric loading of anaerobic pond is 4～8kgCOD/m
3.d; In anaerobic pond, the service temperature of waste water is 40～42 ℃.
First paragraph anaerobic pond of the present invention
1The middle anti-salt anaerobism dominant bacteria that adds is a kind of commercially available biological product, and the trade mark is syBIO1249, and dosage is 0.5～1g/m
3Waste water/day is by reinforced anaerobic microorganism dosing system
4Add, dosing method is to add once every day.This product is a kind of by the spore of programmed screening and domestication and the mixture of the microorganism that nourishes and grows, and microorganism wherein can produce enzyme such as lipase, proteolytic enzyme, amylase and the cellulase etc. of multiple high vigor.Its main products characteristic is bacterial count 3,000,000,000/gram; Stability kept 1 year at 2 ℃～35 ℃; PH scope 5.0～9.8; The bacteria types subtilis spore mixes with the microorganism that nourishes and grows; The outward appearance chocolate brown powder.Anti-salt anaerobism dominant bacteria will carry out activation treatment before adding in the anaerobic pond, namely with the deionized water and stirring dissolving of 20 times more than 0.5 hour, puts in anaerobic pond after making robe all be scattered in water again.
Second segment anaerobic pond of the present invention
2Adopt conventional up-flow anaerobic sludge blanket reaction tank
(UASB), selecting of this type anaerobic reation pool is mainly to consider and can move under high sludge loading, thereby reduces investment and floor space.Reaction tank mainly is comprised of four parts such as distribution plate, granule sludge treatment zone, bulking sludge breeding blanket, gas-solid-liquid separators.From one section anaerobic pond
1The processing water outlet enter reactor by the bottom of UASB, methane gas is discharged by the pneumatic outlet of reactor head, processes water outlet and is expelled to settling tank by the reactor head liquid outlet.The residence time of waste water in UASB is 12～30h, is preferably 15～25h; The water inlet volumetric loading is 5～15kgCOD/m
3.d, be preferably 8～12kgCOD/m
3.d; In reactor, the service temperature of waste water is 38～40 ℃.
First paragraph anaerobic reation pool of the present invention
1With the second segment anaerobic pond
2Top, pond vapor pipe is directly or enter the methane recovery tank after the gas sweetening (not shown in figure 1) respectively for the biogas of middle generation and hydrogen sulfide
5Recycle, the volumetric concentration of the methane in sewage gas gas that obtains is 40%～60%.Considering after hydrogen sulfide enters biogas to make the sulphur content in biogas reach 10g/m
3Above, biogas utilization (fuel, generating) is produced secondary pollution, best advanced promoting the circulation of qi body desulfurization is processed.
Mudpan of the present invention
3Be a kind of radical sedimentation basin or vertical sedimentation basin of routine, the residence time of waste water in settling tank is 2～4h, and sludge liquid is back to the first paragraph anaerobic pond and processes as the dilution water of the former water of cellulose ethanol.After precipitation, the main pollution of water outlet and sludge liquid consists of: COD≤2000mg/L, inorganic salt≤1.0%.
Employing the inventive method is carried out the processing of two phase anaerobic enhancement microbiological to the factory effluent of the quick-fried pretreatment technology producd fibers of acid ethanol, can make pollutent COD main in treating high-concentration saline organic wastewater by 130,000 mg/L be reduced to below 2000 mg/L, sulfate radical by 10,000 mg/L be reduced to below 10 mg/L, inorganic salt are reduced to 1% by 2% left and right, the high density organic constituent major part in waste water is converted to the methane recovery utilization.
The present invention reaches the purpose for the treatment of high-concentration saline organic wastewater energy-saving and emission-reduction, utilization of waste material by the biochemical treatment process of taking economic and reliable, water outlet after processing all obtains decrease due to organic contamination and inorganic salt content, greatly reduces the technical difficulty of follow-up biochemical treatment.
Further illustrate the inventive method and effect below by embodiment.
Adopt treatment process of the present invention that the cellulose ethanol production equipment waste water of domestic certain medium-sized test scale is processed.The principal character of waste water is: COD 129050 mg/L(chromium methods, lower with), sulfate radical 9290 mg/L, inorganic salt 2.0%, pH 4.0.
Adopt two phase anaerobic enhancement microbiological treatment process of the present invention to carry out the laboratory treatment test to above-mentioned waste water, the wastewater treatment scale is 200 mL/h, and main experimental installation formation, operational conditions and the treatment effect of each processing unit see Table 1.After processing by method of the present invention, the COD in cellulose ethanol waste water can be reduced to that 2000mg/L is following, the inorganic salt amount is reduced to 1.0%, sulfate radical is reduced to 10 mg/L, greatly reduces the technical difficulty of waste water subsequent disposal.
The main processing unit of table 1 embodiment 1 consists of and treatment effect.
| The processing unit title | Treatment unit scale and chief component | Main operational conditions and control parameter | Water-in and water-out or |
| 1 first paragraph anaerobic pond | Adopt contact process technique, material synthetic glass, reactor volume 100L.Mainly comprise the formations such as gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device. | The bottom intakes continuously; Water inlet is the former water 200mL/h of cellulose ethanol, detention tank sludge liquid 600 mL/h; Waste water total residence time 5.2d; Water inlet volumetric loading 6.0kgCOD/m 3.d; 40 ℃ of service temperatures; The methane gas average-volume concentration 45% of collecting. | Mix influent quality: COD 34000mg/L, sulfate radical 2330mg/L, inorganic salt 1.25%, sulfide 20mg/L, pH5.5; Effluent quality: COD 7000mg/L, sulfate radical 400mg/L, inorganic salt 1.05%, sulfide 20mg/L, pH7.5; |
| 2 second segment anaerobic ponds | Adopt UASB, material synthetic glass, reactor volume 16L.Mainly comprise the formations such as bottom water distribution board, granule sludge bed, mud buffer layer, Gas-solid-liquid separater, vapor pipe, water shoot, screen cloth. | The bottom is water inlet continuously; Water inlet flow velocity 800mL/h; Retention time of sewage 20h; Water inlet volumetric loading 8.4kgCOD/m 3.d; 39 ℃ of service temperatures; The methane gas average-volume concentration 40% of collecting. | Effluent quality: COD 2000mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 3 detention tanks | Adopt slurry tank, material synthetic glass, tank body volume 4L. | Sedimentation time 4h.Precipitated liquid is back to the first paragraph anaerobic pond, quantity of reflux 600 mL/h; The supernatant liquor discharger. | Effluent quality: COD 2000mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 5 methane recovery | Biogas storage tank and metering system. | First paragraph, second segment anaerobic pond gas are adopted directly and reclaims. | Reclaim biogas amount 240L/d, methane gas average-volume concentration 42% |
Wherein reinforced anaerobic microorganism dosing system working method is: the anti-salt anaerobism dominant bacteria that adds in the first paragraph anaerobic pond is syBIO1249, and dosage is 20mg/ day, and add once every day.Bacterial classification adds frontly uses a small amount of deionized water dissolving, and in vibrator even concussion 0.5h, carry out abundant activation treatment.
Adopt the treatment unit of embodiment 1, process the sewage identical with embodiment 1, the water treatment effect that the operational conditions of change each processing unit obtains sees Table 2.
The main processing unit of table 2 embodiment 2 consists of and treatment effect.
| The processing unit title | Treatment unit scale and chief component | Main operational conditions and control parameter | Water-in and water-out or |
| 1 first paragraph anaerobic pond | Adopt contact process technique, material synthetic glass, reactor volume 100L.Mainly comprise the formations such as gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device. | The bottom intakes continuously; Water inlet is the former water 200mL/h of cellulose ethanol, detention tank sludge liquid 800 mL/h; Waste water total residence time 4.2d; Water inlet volumetric loading 6.7kgCOD/m 3.d; 40 ℃ of service temperatures; The methane gas average-volume concentration 43% of collecting. | Mix influent quality: COD 28000mg/L, sulfate radical 1900mg/L, inorganic salt 1.25%, sulfide 20mg/L, pH6.0; Effluent quality: COD 6800mg/L, sulfate radical 380mg/L, inorganic salt 1.05%, sulfide 20mg/L, pH7.6; |
| 2 second segment anaerobic ponds | Adopt UASB, material synthetic glass, reactor volume 16L.Mainly comprise the formations such as bottom water distribution board, granule sludge bed, mud buffer layer, Gas-solid-liquid separater, vapor pipe, water shoot, screen cloth. | The bottom is water inlet continuously; Water inlet flow velocity 1000mL/h; Retention time of sewage 16h; Water inlet volumetric loading 10.2kgCOD/m 3.d; 39 ℃ of service temperatures; The methane gas average-volume concentration 40% of collecting. | Effluent quality: COD 1900mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 3 detention tanks | Adopt slurry tank, material synthetic glass, tank body volume 4L. | Sedimentation time 4h.Precipitated liquid is back to the first paragraph anaerobic pond, quantity of reflux 800 mL/h; The supernatant liquor discharger. | Effluent quality: COD 1900mg/L, sulfate radical 10mg/L, inorganic salt 1.0%, sulfide 20 mg/L, pH 8.5. |
| 5 methane recovery | Biogas storage tank and metering system. | First paragraph, second segment anaerobic pond gas are adopted directly and reclaims. | Reclaim biogas amount 241L/d, methane gas average-volume concentration 42% |
Wherein the working method of reinforced anaerobic microorganism dosing system is: the anti-salt anaerobism dominant bacteria that adds in the first paragraph anaerobic pond is syBIO1249, and dosage is 25mg/ day, and add once every day.Bacterial classification adds frontly uses a small amount of deionized water dissolving, and in vibrator even concussion 0.5h, carry out abundant activation treatment.
Adopt the treatment unit of embodiment 1, process the sewage identical with embodiment 1, the water treatment effect that the operational conditions of change each processing unit obtains sees Table 3.
The main processing unit of table 3 embodiment 3 consists of and treatment effect.
| The processing unit title | Treatment unit scale and chief component | Main operational conditions and control parameter | Water-in and water-out or |
| 1 first paragraph anaerobic pond | Adopt contact process technique, material synthetic glass, reactor volume 100L.Mainly comprise the formations such as gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit, whipping device. | The bottom intakes continuously; Water inlet is the former water 200mL/h of cellulose ethanol, detention tank sludge liquid 400 mL/h; Waste water total residence time 6.9d; Water inlet volumetric loading 6.6kgCOD/m 3.d; 40 ℃ of service temperatures; The methane gas average-volume concentration 45% of collecting. | Mix influent quality: COD 45600mg/L, sulfate radical 3430mg/L, inorganic salt 1.38%, sulfide 20mg/L, pH4.8; Effluent quality: COD 10000mg/L, sulfate radical 1000mg/L, inorganic salt 1.1%, sulfide 20mg/L, pH7.0; |
| 2 second segment anaerobic ponds | Adopt UASB, material synthetic glass, reactor volume 16L.Mainly comprise the formations such as bottom water distribution board, granule sludge bed, mud buffer layer, Gas-solid-liquid separater, vapor pipe, water shoot, screen cloth. | The bottom is water inlet continuously; Water inlet flow velocity 600mL/h; Retention time of sewage 26h; Water inlet volumetric loading 9.0kgCOD/m 3.d; 39 ℃ of service temperatures; The methane gas average-volume concentration 40% of collecting. | Effluent quality: COD 4000mg/L, sulfate radical 500mg/L, inorganic salt 1.05%, sulfide 20 mg/L, pH 7.9. |
| 3 detention tanks | Adopt slurry tank, material synthetic glass, tank body volume 4L. | Sedimentation time 4h.Precipitated liquid is back to the first paragraph anaerobic pond, quantity of reflux 400 mL/h; The supernatant liquor discharger. | Effluent quality: COD 4000mg/L, sulfate radical 500mg/L, inorganic salt 1.05%, sulfide 20 mg/L, pH 7.9. |
| 5 methane recovery | Biogas storage tank and metering system. | First paragraph, second segment anaerobic pond gas are adopted directly and reclaims. | Reclaim biogas amount 220L/d, methane gas average-volume concentration 42%. |
Wherein the working method of reinforced anaerobic microorganism dosing system is: the anti-salt anaerobism dominant bacteria that adds in the first paragraph anaerobic pond is syBIO1249, and dosage is 20mg/ day, and add once every day.Bacterial classification adds frontly uses a small amount of deionized water dissolving, and in vibrator even concussion 0.5h, carry out abundant activation treatment.
Claims (11)
1. the anaerobe enhanced processing method of a cellulose ethanol waste water, it is characterized in that comprising following process: from mash at the bottom of the tower of cellulose ethanol distillation tower through solid-liquid separation and cool after, returned sluge liquid after processing with the second segment anaerobic pond is mixed into the first paragraph anaerobic pond, simultaneously regularly add appropriate anti-salt anaerobic species in the first paragraph anaerobic pond, the anaerobic sludge that waste water is produced at first paragraph anaerobic pond self, complete the elementary anaerobic digestion reaction of waste water under the returned sluge of second segment anaerobic pond and the anti-salt anaerobic species acting in conjunction that adds, partial organic substances is changed into biogas, the part of sulfuric acid root is reduced to hydrogen sulfide and enters in biogas, the water outlet of first paragraph anaerobic pond enters the second segment anaerobic pond and processes, the anaerobic digestion reaction further occurs in the waste water in the second segment anaerobic pond under the anaerobic sludge effect of self producing, most of organism is changed into biogas, and water outlet enters settling tank and processes, the at least part of first paragraph anaerobic pond that is back to of the sludge liquid of settling tank.
2. it is characterized in that in accordance with the method for claim 1: the first paragraph anaerobic pond adopts conventional contact process anaerobic reation pool.
3. in accordance with the method for claim 1, it is characterized in that: the water inlet of first paragraph anaerobic pond is the mixture of the sludge liquid after the former water of cellulose ethanol and second segment anaerobic pond are processed, by conditioning of mud hydraulic control influent COD≤40000mg/L processed, inorganic salt massfraction≤1.5%.
4. it is characterized in that in accordance with the method for claim 1: the second segment anaerobic pond adopts the up-flow anaerobic sludge blanket reaction tank.
5. according to the described method of claim 1 or 2, it is characterized in that: the first paragraph anaerobic pond is comprised of gas skirt, Chi Gai, pond body, feed-pipe, drainage conduit and whipping device.
6. in accordance with the method for claim 3, it is characterized in that: the sludge liquid after first paragraph anaerobic pond charging waste water is processed by the former water of cellulose ethanol and second segment anaerobic pond consists of, and its control volume ratio is: the former water/sludge liquid of cellulose ethanol=1:2～1:5.
7. in accordance with the method for claim 1, it is characterized in that: in the first paragraph anaerobic pond, the residence time of waste water in anaerobic pond is 3～10d, and the water inlet volumetric loading of anaerobic pond is 4～8kgCOD/m
3.d; In anaerobic pond, the service temperature of waste water is 40～42 ℃.
8. it is characterized in that in accordance with the method for claim 1: the anti-salt anaerobism dominant bacteria dosage that adds in the first paragraph anaerobic pond is 0.2～2g/m
3Waste water/day, dosing method is to add once in every 0.5～3 day.
9. in accordance with the method for claim 1, it is characterized in that: the second segment anaerobic pond is upflow anaerobic sludge blanket reactor, is comprised of distribution plate, granule sludge treatment zone, the gentle solid-liquid separator in bulking sludge breeding blanket.
10. according to the described method of claim 1 or 9, it is characterized in that: the residence time of waste water in the second segment anaerobic pond is 12～30h, and the water inlet volumetric loading is 5～15kgCOD/m
3.d, in reactor, the service temperature of waste water is 38～40 ℃.
11. in accordance with the method for claim 1, it is characterized in that: settling tank is radical sedimentation basin or vertical sedimentation basin, and the residence time of waste water in settling tank is 2～4h.
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| CN103387313A (en) * | 2013-07-19 | 2013-11-13 | 济南圣泉集团股份有限公司 | Method for treating cellulosic ethanol waste water |
| CN106746162A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of processing method of cellulose ethanol production wastewater |
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| CN101565234A (en) * | 2008-04-23 | 2009-10-28 | 广东省广宁县顺宁葡萄糖药业有限公司 | Technology for treating alcohol waste water by anaerobic digestion |
| CN101805100A (en) * | 2010-05-11 | 2010-08-18 | 天津大学 | Method for improving activated sludge concentration in alcohol wastewater full-distillage anaerobic digestion process |
| CN102001792A (en) * | 2010-11-28 | 2011-04-06 | 江苏蓝星环保科技有限公司 | Glyphosate wastewater treatment method |
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| CN101565234A (en) * | 2008-04-23 | 2009-10-28 | 广东省广宁县顺宁葡萄糖药业有限公司 | Technology for treating alcohol waste water by anaerobic digestion |
| CN101805100A (en) * | 2010-05-11 | 2010-08-18 | 天津大学 | Method for improving activated sludge concentration in alcohol wastewater full-distillage anaerobic digestion process |
| CN102001792A (en) * | 2010-11-28 | 2011-04-06 | 江苏蓝星环保科技有限公司 | Glyphosate wastewater treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103387313A (en) * | 2013-07-19 | 2013-11-13 | 济南圣泉集团股份有限公司 | Method for treating cellulosic ethanol waste water |
| CN106746162A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of processing method of cellulose ethanol production wastewater |
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